JP2020144318A - Display module and display unit - Google Patents

Abstract

To provide a display module that is compact and allows easy alignment between display panels.SOLUTION: A display module of the present invention comprises: a display module body; and a housing. The display module body has a first display element, a second display element, and a prism. The housing has a first frame that holds the first display element, and a second frame that holds the second display element. The first frame has a first plate part, a second plate part, and a third plate part; the second frame has a fourth plate part, a fifth plate part, and a sixth plate part; at least one of the first frame and the second frame has an attachment part. In the first frame, the prism is located between the first plate part and the second plate part, and the third plate part is in contact with the first display element and holds the first display element while being opposite to a first surface. In the second frame, the prism is located between the fourth plate part and the fifth plate part, and the sixth plate part is in contact with the second display element and holds the second display element while being opposite to a second surface.SELECTED DRAWING: Figure 1

Description

The present invention relates to a display module and a display device.

In recent years, display devices such as head-mounted displays and head-up displays have been provided in which a virtual image is projected onto the space in front of the observer's eyes so that the observer can visually recognize the virtual image.

In Patent Document 1 below, a video element composed of a liquid crystal panel, a case for housing the video element, a projection optical system for projecting light from the video element, a lens barrel for housing the projection optical system, and a projection optical system A head-mounted display is disclosed that includes a light guide device that guides the light of the light to the eyes of an observer. In this head-mounted display, the image element and the projection optical system are aligned by fixing the case in which the image element is housed to the lens barrel.

Japanese Unexamined Patent Publication No. 2014-186201

The above-mentioned Patent Document 1 discloses a structure in which one image element is fixed to a lens barrel. On the other hand, in the field of projectors, for example, a plurality of display panels that emit red light, green light, and blue light, and a color synthesis element that synthesizes a plurality of color lights emitted from a plurality of display panels. A display module equipped with the above is conventionally known.

In this type of display module, precise alignment between a plurality of display panels is important to ensure display quality. Further, when this kind of display module is applied to a display device such as a head-mounted display, it is highly necessary to house the display module in a housing having a limited size, and it is required to have a compact configuration. However, at present, there has not been provided a display module that is easy to align a plurality of display panels and has a compact configuration.

In order to solve the above problems, the display module according to one aspect of the present invention includes a display module main body and a housing provided in the display module main body, and the display module main body includes a first display element. The housing comprises a second display element and a prism that synthesizes a first light emitted from the first display element and a second light emitted from the second display element. A first frame that holds the first display element in a state of facing the first surface of the prism, and a second frame that holds the second display element in a state of facing the second surface of the prism. The first frame has a first plate portion and a second plate portion that face each other, and a third plate portion that connects the first plate portion and the second plate portion, and has the first plate portion. The two frames include a fourth plate portion and a fifth plate portion that face each other, and a sixth plate portion that connects the fourth plate portion and the fifth plate portion, and the first frame and the first plate portion. At least one of the two frames has a mounting portion for mounting the display module main body to the support member, and in the first frame, the prism is located between the first plate portion and the second plate portion. The first display element is held in a state where the third plate portion is in contact with the first display element and is opposed to the first surface, and the second frame is formed by the fourth plate portion and the fifth plate portion. The prism is located between the plate and the second display element, and the sixth plate is in contact with the second display element and is opposed to the second surface to hold the second display element.

In the display module according to one aspect of the present invention, the first frame and the second frame are configured to include a metal material, and the first frame and the first display element are thermally connected to each other. The two frames and the second display element may be thermally connected.

In the display module of one aspect of the present invention, the first display element and the second plate portion of the first frame are brought into contact with a part of the first surface of the prism. A step portion for defining the distance from the first surface is provided, and the fourth plate portion and the fifth plate portion of the second frame are brought into contact with a part of the second surface of the prism. A step portion that defines the distance between the second display element and the second surface may be provided.

In the display module of one aspect of the present invention, the display module main body further includes a third display element, and the prism is emitted from the first light, the second light, and the third display element. The housing further has a third frame that holds the third display element in a state of facing the third surface of the prism, and the third frames face each other. It has a 7th plate portion and an 8th plate portion, and a 9th plate portion connecting the 7th plate portion and the 8th plate portion, and the 3rd frame includes the 7th plate portion and the said The third display element may be held in a state where the prism is located between the eighth plate portion and the third plate portion is in contact with the third display element and is opposed to the third surface. ..

In the display module of one aspect of the present invention, the third frame may be configured to include a metal material, and the third frame and the third display element may be thermally connected.

In the display module of one aspect of the present invention, the third display element and the third display element are brought into contact with the seventh plate portion and the eighth plate portion of the third frame by abutting a part of the third surface of the prism. A step portion that defines the distance from the third surface may be provided.

In the display module of one aspect of the present invention, the first surface and the second surface of the prism face each other, and the third surface is located in a direction intersecting the first surface and the second surface. Then, a part of the 7th plate part and the prism sandwich the part of the 1st plate part and the part of the 4th plate part, or a part of the 8th plate part. A second sandwiching portion may be provided in which the prism sandwiches a part of the second plate portion and a part of the fifth plate portion.

In the display module according to one aspect of the present invention, a through hole is provided in the first sandwiching portion or the second sandwiching portion, and the first frame, the third frame, and the second frame are provided in the through hole. A connecting member for connecting the third frame and the third frame may be provided.

In the display module according to one aspect of the present invention, the first frame and the third frame, and the second frame and the third frame are fitted to the first sandwiching portion or the second sandwiching portion. A fitting portion for connecting to the frame may be provided.

In the display module of one aspect of the present invention, the mounting portion may be provided in each of the first frame and the second frame.

In the display module according to one aspect of the present invention, the mounting portion may be provided with a position adjusting mechanism for adjusting the position of the display module main body with respect to the support member.

The display device of one aspect of the present invention includes a display module of one aspect of the present invention.

It is a perspective view of the display module of 1st Embodiment. It is a perspective view which shows the state which attached the display module to a support member. It is a perspective view of the display module main body. It is a perspective view which shows the state before attaching the frame for a blue panel to a display module main body. It is a perspective view which shows the state after the blue panel frame is attached to the display module main body. It is a perspective view which shows the state after attaching the blue panel frame and the red panel frame to the display module main body. It is a perspective view which shows the state before attaching the green panel frame to the display module main body. It is a perspective view which shows the state after the green panel frame is attached to the display module main body. It is a perspective view which shows the state before attaching the fixing pin to the display module main body. It is a front view which shows the state which attached the display module to a support member. It is an enlarged view of the position adjustment mechanism. It is a schematic block diagram of the head-mounted display device of 2nd Embodiment. It is a perspective view which shows typically the optical system of the display device shown in FIG. It is a figure which shows the optical path of the optical system shown in FIG.

[First Embodiment]
Hereinafter, the first embodiment of the present invention will be described with reference to FIGS. 1 to 10.
In the first embodiment, an example of a display module including three display panels and a prism will be described.
In each of the following drawings, in order to make each component easy to see, the scale of the dimension may be different depending on the component.

FIG. 1 is a perspective view of the display module 10 of the first embodiment.
As shown in FIG. 1, the display module 10 includes a display module main body 11 and a housing 12 provided on the display module main body 11.

FIG. 2 is a perspective view showing a state in which the display module 10 is attached to the subframe 90 (support member) of the display device.
The display module 10 is used in a display device such as a head-mounted display or a head-up display. When the display module 10 is mounted on the display device, as shown in FIG. 2, the display module 10 is attached to any support member constituting the display device via the first mounting portion and the second mounting portion described later. Be done. In the present embodiment, the subframe 90 accommodating the light guide optical system in the subsequent stage of the display module 10 is used as the support member, but the support member to which the display module 10 is fixed is not particularly limited.

FIG. 3 is a perspective view of the display module main body 11.
As shown in FIG. 3, the display module main body 11 includes a blue display panel 14B (first display element), a red display panel 14R (second display element), a green display panel 14G (third display element), and a prism. It has 15 and. The blue display panel 14B emits blue light (first light). The red display panel 14R emits red light (second light). The green display panel 14G emits green light (third light). The prism 15 synthesizes the blue light emitted from the blue display panel 14B, the red light emitted from the red display panel 14R, and the green light emitted from the green display panel 14G.

The blue display panel 14B, the red display panel 14R, and the green display panel 14G have different colors of emitted light, that is, display colors, but have substantially the same configuration. Therefore, in the following, these display panels 14B, 14R, 14G are simply referred to as display panels, and the configuration of the display panel 14 will be described.

The display panel 14 has an element substrate 16 and a sealing substrate 17. A plurality of organic electroluminescence (EL) elements are provided on the first surface of the element substrate 16 in a form of being arranged in a matrix. Each of the plurality of organic EL elements constitutes a pixel, and a region in which the plurality of organic EL elements are arranged in a matrix is an image display region. The image of each color is formed by controlling the light emission / non-light emission of each organic EL element on the corresponding element substrate 16. The element substrate 16 is made of a semiconductor substrate such as silicon.

The sealing substrate 17 is provided so as to face the first surface of the element substrate 16. By covering the plurality of organic EL elements, the sealing substrate 17 prevents moisture, dust, and the like from entering the formation regions of the plurality of organic EL elements. The sealing substrate 17 is made of a translucent substrate such as glass.

The prism 15 includes four triangular columnar prisms 151 and two dichroic mirrors 152 and 153. The prism 15 has a structure in which four triangular columnar prisms 151 are bonded to each other, and has a substantially rectangular parallelepiped shape as a whole. The two dichroic mirrors 152 and 153 are provided on the bonding surface of the triangular columnar prism 151, respectively. Of the six surfaces of the rectangular parallelepiped forming the outer shape of the prism 15, the surface facing the blue display panel 14B is designated as the first surface 15a, the surface facing the red display panel 14R is designated as the second surface 15b, and facing the green display panel 14G. The surface to be used is the third surface 15c. The first surface 15a and the second surface 15b face each other, and the surface facing the third surface 15c is referred to as the fourth surface 15d. The remaining two surfaces are the fifth surface 15e and the sixth surface 15f, respectively.

When the prism 15 is viewed from the normal direction of the fifth surface 15e or the sixth surface 15f, the two dichroic mirrors 152 and 153 intersect each other in an X shape on the fifth surface 15e or the sixth surface 15f. It is provided. The first dichroic mirror 152 has a property of reflecting blue light and transmitting green light and red light. The second dichroic mirror 153 has a property of reflecting red light and transmitting green light and blue light.

The blue light emitted from the blue display panel 14B is incident on the prism 15 from the first surface 15a. The red light emitted from the red display panel 14R is incident on the prism 15 from the second surface 15b. The green light emitted from the green display panel 14G is incident on the prism 15 from the third surface 15c. The blue light incident on the prism 15 is reflected by the first dichroic mirror 152 and travels toward the fourth surface 15d. The red light incident on the prism 15 is reflected by the second dichroic mirror 153 and travels toward the fourth surface 15d. The green light incident on the prism 15 passes through the first dichroic mirror 152 and the second dichroic mirror 153 and travels toward the fourth surface 15d. In this way, the prism 15 synthesizes the blue light emitted from the blue display panel 14B, the red light emitted from the red display panel 14R, and the green light emitted from the green display panel 14G. The synthesized light is emitted from the fourth surface 15d of the prism 15.

In the present embodiment, each display panel 14 is fixed to the prism 15 via an optical adhesive (not shown) so that the sealing substrate 17 faces each surface of the prism 15. Therefore, the blue display panel 14B is provided so that the sealing substrate 17 comes into contact with the first surface 15a of the prism 15 via an optical adhesive. The red display panel 14R is provided so that the sealing substrate 17 comes into contact with the second surface 15b of the prism 15 via an optical adhesive. The green display panel 14G is provided so that the sealing substrate 17 comes into contact with the third surface 15c of the prism 15 via an optical adhesive.

The light emitted from the organic EL element is not emitted from the element substrate 16 having no translucency, but is emitted from the sealing substrate 17 having translucency and incident on the prism 15. It should be noted that each display panel 14 does not necessarily have to be in contact with each surface of the prism 15 via an optical adhesive, and may be in contact with each surface of the prism 15 without an optical adhesive. Further, each display panel 14 may be arranged away from the prism 15 while being held by the housing 12. That is, a gap may be provided between each display panel 14 and each surface of the prism 15.

In each display panel 14, the element substrate 16 is arranged so that one end of the element substrate 16 does not face the prism 15 and protrudes to the outside of the prism 15. Of the element substrate 16, the region at the end of the element substrate 16 that does not face the prism 15 is outside the image display region, and is an region provided with circuits, wiring, external connection terminals, etc. for driving a plurality of pixels. is there. Further, an external board such as a flexible printed wiring board (FPC) on which a drive circuit element is mounted may be connected to the external connection terminal. In the present embodiment, the shape of the element substrate 16 is rectangular, of the four sides of the element substrate 16, the two sides on the side where a part protrudes are set as the first side 16a, and the two sides orthogonal to the first side 16a are set. The second side is 16b.

The blue display panel 14B is arranged so that one end of the element substrate 16 protrudes to the light emitting side of the synthetic light (outside the fourth surface 15d of the prism 15). Contrary to the blue display panel 14B, the red display panel 14R is arranged so that one end of the element substrate 16 protrudes to the side opposite to the light emitting side of the synthetic light (outside the third surface 15c of the prism 15). ing. The green display panel 14G is arranged so that one end of the element substrate 16 protrudes to the side of the blue display panel 14B (outside the first surface 15a of the prism 15). That is, when the display module main body 11 is viewed from the side of the fifth surface 15e, the blue display panel 14B protrudes to the left from the prism 15, the red display panel 14R protrudes to the right from the prism 15, and the green display panel 14G protrudes from the prism 15. It sticks out to the upper side. According to this arrangement, the size of the prism 15 can be reduced. However, the arrangement of each display panel 14 is not limited to this example, and can be changed as appropriate.

As shown in FIGS. 1 and 2, the housing 12 includes a blue panel frame 19B (first frame), a red panel frame 19R (second frame), and a green panel frame 19G (third frame). It has a plurality of fixing pins 21 (connecting members). The blue panel frame 19B holds the blue display panel 14B in a state of facing the first surface 15a of the prism 15. The red panel frame 19R holds the red display panel 14R in a state of facing the second surface 15b of the prism 15. The green panel frame 19G holds the green display panel 14G in a state of facing the third surface 15c of the prism 15.

Hereinafter, the detailed configuration of each frame 19B, 19R, 19G will be described together with the assembly process of the display module 10.
FIG. 4A is a perspective view showing a state before the blue panel frame 19B is attached to the display module main body 11. FIG. 4B is a perspective view showing a state after the blue panel frame 19B is attached to the display module main body 11.
FIG. 5 is a perspective view showing a state after the blue panel frame 19B and the red panel frame 19R are attached to the display module main body 11.
FIG. 6A is a perspective view showing a state before the green panel frame 19G is attached to the display module main body 11. FIG. 6B is a perspective view showing a state after the green panel frame 19G is attached to the display module main body 11.
FIG. 7 is a perspective view showing a state before attaching the fixing pin 21 to the display module main body 11.

In the assembly process of the present embodiment, each of the blue display panel 14B, the red display panel 14R, and the green display panel 14G is temporarily fixed to the prism 15 in advance before the frames 19B, 19R, and 19G are attached to the display module main body 11. This will be described using an example.

As shown in FIG. 4A, the blue panel frame 19B has a third plate portion 19B3 that connects the first plate portion 19B1 and the second plate portion 19B2 facing each other and the first plate portion 19B1 and the second plate portion 19B2. And the first mounting portion 19B0. The first plate portion 19B1, the second plate portion 19B2, the third plate portion 19B3, and the first mounting portion 19B0 are made of an integral plate material. The first plate portion 19B1 and the third plate portion 19B3 are formed so as to form an angle of approximately 90 °. The second plate portion 19B2 and the third plate portion 19B3 are formed so as to form an angle of approximately 90 °. As a result, the prism 15 is housed in the space surrounded by the first plate portion 19B1, the second plate portion 19B2, and the third plate portion 19B3. The frame 19B for a blue panel is made of a metal material such as aluminum, titanium, magnesium, and an alloy thereof, or a plastic containing carbon fiber.

Hereinafter, the space surrounded by the first plate portion 19B1, the second plate portion 19B2, and the third plate portion 19B3 and in which the prism 15 is accommodated is referred to as an accommodation space S1. Of the surfaces of the first plate portion 19B1, the second plate portion 19B2, and the third plate portion 19B3, the surface facing the accommodation space S1 is referred to as the first surface 19Ba, and is opposite to the first surface 19Ba. The surface of is referred to as the second surface 19Bb.

The first plate portion 19B1 has a trapezoidal shape when viewed from the normal direction of the second surface 19Bb of the first plate portion 19B1. That is, of the four sides of the trapezoid forming the outer shape of the first plate portion 19B1, the second side 19b2 facing the first side 19b1 on the side connected to the third plate portion 19B3 is relative to the first side 19b1. It extends diagonally. The remaining third side 19b3 and fourth side 19b4 are parallel to each other and extend perpendicular to the first side 19b1. A through hole 19b5 that penetrates the first plate portion 19B1 in the plate thickness direction is provided in the vicinity of the corner portion where the second side 19b2 and the third side 19b3 meet at an acute angle.

Further, the first surface 19Ba of the first plate portion 19B1 is provided with a stepped portion 19b6 overhanging toward the accommodation space S1. The dimension W1 of the second side 16b of the blue display panel 14B is shorter than the dimension W2 of one side of the prism 15 parallel to the second side 16b. That is, W1 <W2. Therefore, of the first surface 15a of the prism 15, the regions on both sides of the region to which the blue display panel 14B is joined are exposed portions exposed from the blue display panel 14B. In a state where the blue panel frame 19B is attached to the display module main body 11, the stepped portion 19b6 comes into contact with the exposed portion of the first surface 15a of the prism 15.

Further, the dimension L1 from the first surface 19Ba to the step portion 19b6 of the third plate portion 19B3 is substantially equal to the thickness T1 of the blue display panel 14B. That is, L1≈T1. Strictly speaking, the dimension L1 from the first surface 19Ba to the step 19b6 of the third plate portion 19B3 is equal to the total thickness of the thickness T1 of the blue display panel 14B and the thickness of the optical adhesive.

In this case, as shown in FIG. 4B, when the step portion 19b6 is brought into contact with a part of the first surface 15a of the prism 15, the first surface 19Ba of the third plate portion 19B3 is brought into contact with the blue display panel 14B. In other words, in the case of the present embodiment, since the first surface 19Ba of the third plate portion 19B3 and the blue display panel 14B are in contact with each other, the blue display panel 14B and the first surface 15a of the prism 15 are in contact with each other. Become. That is, the distance between the blue display panel 14B and the first surface 15a of the prism 15 is zero.

As will be described later, the blue display panel 14B and the third plate portion 19B3 need to be in contact with each other from the viewpoint of heat conduction, but the blue display panel 14B and the prism 15 do not necessarily have to be in contact with each other, and are blue. There may be a gap between the display panel 14B and the first surface 15a of the prism 15. When a gap is provided between the blue display panel 14B and the prism 15, the dimension L1 from the first surface 19Ba to the step portion 19b6 of the third plate portion 19B3 is the dimension of the gap and the thickness T1 of the blue display panel 14B. Is set to be equal to the sum of the dimensions. In this way, the stepped portion 19b6 abuts on a part of the first surface 15a of the prism 15 to define the distance between the blue display panel 14B and the first surface 15a of the prism 15.

As shown in FIG. 4A, the second plate portion 19B2 has the same configuration as the first plate portion 19B1. The second plate portion 19B2 is provided at the end of the third plate portion 19B3 on the side opposite to the side where the first plate portion 19B1 is provided, symmetrically with the first plate portion 19B1. Therefore, the description of the second plate portion 19B2 will be omitted.

The first mounting portion 19B0 is provided along the edge of the second surface 19Bb of the third plate portion 19B3. The first mounting portion 19B0 is composed of a wall portion protruding from the second surface 19Bb of the third plate portion 19B3. The first mounting portion 19B0 is configured as a member integrated with the third plate portion 19B3. The first mounting portion 19B0 is provided with a through hole 19b7 penetrating in the direction along the second surface 19Bb of the third plate portion 19B3. The first mounting portion 19B0 functions as a member for mounting the display module main body 11 to the support member.

As shown in FIG. 5, the red panel frame 19R is a sixth plate portion 19R6 that connects the fourth plate portion 19R4 and the fifth plate portion 19R5 facing each other and the fourth plate portion 19R4 and the fifth plate portion 19R5. And a second mounting portion 19R0. Further, each of the fourth plate portion 19R4 and the fifth plate portion 19R5 is provided with a through hole 19r5 and a step portion 19r6. The second mounting portion 19R0 is provided with a through hole 19r7. As described above, the red panel frame 19R has the same configuration as the blue panel frame 19B. Therefore, detailed description of each part of the red panel frame 19R will be omitted.

As shown in FIG. 6A, the green panel frame 19G is a ninth plate portion 19G9 that connects the seventh plate portion 19G7 and the eighth plate portion 19G8 facing each other and the seventh plate portion 19G7 and the eighth plate portion 19G8. And have. In the green panel frame 19G, the display module main body 11 is housed in the space S2 surrounded by the 7th plate portion 19G7, the 8th plate portion 19G8, and the 9th plate portion 19G9. Like the blue panel frame 19B, the green panel frame 19G is made of a metal material such as aluminum, titanium, magnesium, and an alloy thereof, or a plastic containing carbon fiber.

Hereinafter, the space surrounded by the 7th plate portion 19G7, the 8th plate portion 19G8, and the 9th plate portion 19G9 and in which the display module main body 11 is accommodated is referred to as an accommodation space S2. Of the surfaces of the 7th plate portion 19G7, the 8th plate portion 19G8, and the 9th plate portion 19G9, the surface facing the accommodation space S2 is referred to as the 1st surface 19Ga, which is opposite to the 1st surface 19Ga. The surface is referred to as a second surface 19Gb.

The shape of the seventh plate portion 19G7 when viewed from the normal direction of the second surface 19Gb of the seventh plate portion 19G7 is rectangular. That is, of the four rectangular sides forming the outer shape of the seventh plate portion 19G7, the second side 19g2 facing the first side 19g1 on the side connected to the ninth plate portion 19G9 is relative to the first side 19g1. It extends in parallel. The third side 19g3 and the fourth side 19g4 are parallel to each other and extend perpendicular to the first side 19g1 and the second side 19g2. In the vicinity of the corner where the second side 19g2 and the third side 19g3 meet, and the corner where the second side 19g2 and the fourth side 19g4 meet, a through hole 19g5 that penetrates the seventh plate portion 19G7 in the plate thickness direction Are provided respectively.

Further, the first surface 19Ga of the seventh plate portion 19G7 is provided with a first stage portion 19g7 projecting toward the accommodation space S2. When viewed from the normal direction of the first surface 19Ga of the seventh plate portion 19G7, the first step portion 19g7 has the side of the first side 19g1 of the seventh plate portion 19G7 as the base and the apex angle to the side of the second side 19g2. It is provided in the shape of an isosceles triangle having. The apex angle α1 of the isosceles triangle forming the shape of the first step portion 19g7 is the second side of the first plate portion 19B1 when the blue panel frame 19B and the red panel frame 19R are attached to the display module main body 11. It corresponds to the apex angle α2 of the isosceles triangle formed by 19b2 and the second side 19r2 of the fourth plate portion 19R4. In this case, the first step portion 19g7 comes into contact with the end face of the first plate portion 19B1 and the end face of the fourth plate portion 19R4. However, the apex angle α1 does not necessarily have to coincide with the apex angle α2, and may be smaller than the apex angle α2. In that case, the first stage portion 19g7 does not come into contact with the end face of the first plate portion 19B1 and the end face of the fourth plate portion 19R4.

Further, the first surface 19Ga of the seventh plate portion 19G7 is provided with a second stage portion 19g8 that further projects from the first stage portion 19g7 toward the accommodation space S2 side. The second step portion 19g8 has the same configuration and the same function as the step portion 19b6 described in the blue panel frame 19B.

That is, the dimension L3 from the first surface 19Ga of the ninth plate portion 19G9 to the second step portion 19g8 is substantially equal to the thickness T2 of the green display panel 14G. That is, L3≈T2. Strictly speaking, the dimension L3 from the first surface 19Ga of the ninth plate portion 19G9 to the second step portion 19g8 is equal to the sum of the thickness T2 of the green display panel 14G and the thickness of the optical adhesive.

In this case, as shown in FIG. 6B, when the second stage portion 19g8 is brought into contact with a part of the third surface 15c of the prism 15, the first surface 19Ga of the ninth plate portion 19G9 is in contact with the green display panel 14G. .. In other words, in the case of the present embodiment, since the first surface 19Ga of the ninth plate portion 19G9 and the green display panel 14G are in contact with each other, the green display panel 14G and the third surface 15c of the prism 15 are in contact with each other. Become. That is, the distance between the green display panel 14G and the third surface 15c of the prism 15 is zero. In this way, the second stage portion 19g8 defines the distance between the green display panel 14G and the third surface 15c of the prism 15 by abutting on a part of the third surface 15c of the prism 15.

The eighth plate portion 19G8 has the same configuration as the seventh plate portion 19G7. The eighth plate portion 19G8 is provided at the end of the ninth plate portion 19G9 on the side opposite to the side where the seventh plate portion 19G7 is provided, symmetrically with the seventh plate portion 19G7. Therefore, the description of the eighth plate portion 19G8 will be omitted.

Hereinafter, an example of the assembly process of the display module 10 will be described.

(First step)
First, as shown in FIG. 3, each of the blue display panel 14B, the red display panel 14R, and the green display panel 14G is temporarily fixed to the prism 15 by using an optical adhesive. As the optical adhesive, for example, an ultraviolet curable optical adhesive can be used. In this step, each display panel 14 is roughly aligned with respect to the prism 15 using, for example, an arbitrary alignment mark. Further, the optical adhesive is not completely cured, and the relative positions of the blue display panel 14B, the red display panel 14R, and the green display panel 14G and the prism 15 are finely adjusted. By this step, the display module main body 11 is manufactured.

(Second step)
Next, as shown in FIG. 4A, the blue panel frame 19B is attached to the display module main body 11. At this time, as shown in FIG. 4B, the blue panel frame with respect to the display module main body 11 until the step portion 19b6 of the first plate portion 19B1 and the second plate portion 19B2 abuts on the first surface 15a of the prism 15. Push in 19B. At this time, the portion of the first plate portion 19B1 on the tip side of the step portion 19b6 abuts on the fifth surface 15e of the prism 15, and the portion of the second plate portion 19B2 not shown on the tip side of the step portion 19B2 It comes into contact with the sixth surface of the prism 15, and the first plate portion 19B1 and the second plate portion 19B2 are in a state of sandwiching the prism 15 from the outside of the fifth surface 15e and the sixth surface. As described above, since there is no gap between the first plate portion 19B1 and the second plate portion 19B2 and the prism 15, the first plate portion 19B1 and the second plate portion 19B2 face each other in the blue panel frame 19B. It does not shift in the direction.

Further, the third plate portion 19B3 comes into contact with the blue display panel 14B, and the third plate portion 19B3 is in a state of pressing the blue display panel 14B toward the prism 15. In this way, in the blue panel frame 19B, the prism 15 is located between the first plate portion 19B1 and the second plate portion 19B2, the third plate portion 19B3 abuts on the blue display panel 14B, and the prism 15 The blue display panel 14B is held so as to face the first surface 15a. At this time, the blue panel frame 19B and the blue display panel 14B are thermally connected at the third plate portion 19B3.

(Third step)
Next, the red panel frame 19R is attached to the display module main body 11. This mounting method is the same as the mounting method of the blue panel frame 19B in the second step. That is, as shown in FIG. 5, from the direction opposite to that of the blue panel frame 19B, until the position where the stepped portion 19r6 of the fourth plate portion 19R4 and the fifth plate portion 19R5 abuts on the second surface 15b of the prism 15. The red panel frame 19R is pushed into the display module main body 11.

At this time, the portion of the fourth plate portion 19R4 on the tip side of the step portion 19r6 abuts on the fifth surface 15e of the prism 15, and the portion of the fifth plate portion 19R5 on the tip side of the step portion 19r6 is a prism. The fourth plate portion 19R4 and the fifth plate portion 19R5 are in contact with the sixth surface of the fifteen, and the prism 15 is sandwiched from the outside of the fifth surface 15e and the sixth surface.

Further, the sixth plate portion 19R6 comes into contact with the red display panel 14R, and the sixth plate portion 19R6 is in a state of pressing the red display panel 14R toward the prism 15. In this way, in the red panel frame 19R, the prism 15 is located between the fourth plate portion 19R4 and the fifth plate portion 19R5, the sixth plate portion 19R6 abuts on the red display panel 14R, and the prism 15 The red display panel 14R is held so as to face the second surface 15b. At this time, the red panel frame 19R and the red display panel 14R are thermally connected at the sixth plate portion 19R6.

The order in which the blue panel frame 19B and the red panel frame 19R are attached to the display module main body 11 is not particularly limited, and may be the reverse order of the present embodiment.

(4th step)
Next, as shown in FIG. 6A, the green panel frame 19G is attached to the display module main body 11. At this time, as shown in FIG. 6B, the triangular first step portion 19g7 of the seventh plate portion 19G7 and the eighth plate portion 19G8 abuts on the end surface of the blue panel frame 19B and the end surface of the red panel frame 19R. At the same time, the green panel frame 19G is pushed into the display module main body 11 until the position where the second stage portion 19g8 abuts on a part of the third surface 15c of the prism 15.

At this time, the portion inside the triangle forming the outer shape of the first step portion 19g7 of the seventh plate portion 19G7 abuts on the fifth surface 15e of the prism 15, and the first step portion 19g7 of the eighth plate portion 19G8. The portion inside the outer triangular shape abuts on the sixth surface of the prism 15, and the seventh plate portion 19G7 and the eighth plate portion 19G8 sandwich the prism 15 from the outside of the fifth surface 15e and the sixth surface. It becomes a state. As described above, since there is no gap between the 7th plate portion 19G7 and the 8th plate portion 19G8 and the prism 15, the 7th plate portion 19G7 and the 8th plate portion 19G8 face each other in the green panel frame 19G. It does not shift in the direction. Further, the triangular first step portion 19g7 of the 7th plate portion 19G7 and the 8th plate portion 19G8 is fitted into the triangular concave portion formed by the end face of the blue panel frame 19B and the end face of the red panel frame 19R. Therefore, the green panel frame 19G does not deviate in the direction orthogonal to the direction in which the seventh plate portion 19G7 and the eighth plate portion 19G8 face each other.

On the other hand, the portion outside the triangle forming the outer shape of the first stage portion 19g7 of the seventh plate portion 19G7 is the first plate portion 19B1 of the blue panel frame 19B when viewed from the normal direction of the seventh plate portion 19G7. It is in a state of overlapping a part and a part of the fourth plate portion 19R4 of the red panel frame 19R. As a result, a part of the seventh plate portion 19G7 and the prism 15 sandwich a part of the first plate portion 19B1 and a part of the fourth plate portion 19R4, and as shown in FIG. 6B, the first sandwiching portion 23 To configure.

Similarly, the portion outside the triangle forming the outer shape of the first stage portion 19g7 of the eighth plate portion 19G8 is the second plate portion 19B2 of the blue panel frame 19B when viewed from the normal direction of the eighth plate portion 19G8. And a part of the fifth plate portion 19R5 of the red panel frame 19R are overlapped with each other. As a result, a part of the eighth plate portion 19G8 and the prism 15 sandwich a part of the second plate portion 19B2 and a part of the fifth plate portion 19R5, and as shown in FIG. 6B, the second sandwiching portion 24 To configure. In this way, the green panel frame 19G holds the blue panel frame 19B and the red panel frame 19R.

Further, in the green panel frame 19G, the prism 15 is located between the 7th plate portion 19G7 and the 8th plate portion 19G8, the 9th plate portion 19G9 abuts on the green display panel 14G, and the third surface of the prism 15 The green display panel 14G is held in a state facing the 15c. At this time, the green panel frame 19G and the green display panel 14G are thermally connected at the ninth plate portion 19G9.

(Fifth step)
After attaching the green panel frame 19G to the display module main body 11, in the first sandwiching portion 23, the through hole 19g5 of the seventh plate portion 19G7 of the green panel frame 19G and the first plate portion 19B1 of the blue panel frame 19B The through hole 19b5 is formed so as to be located coaxially, and becomes one continuous through hole. Further, a through hole 19g5 of the eighth plate portion 19G8 of the green panel frame 19G, a through hole 19b5 of the second plate portion 19B2 of the blue panel frame 19B, and a through hole 19g5 of the eighth plate portion 19G8 of the green panel frame 19G. Each of the through holes of the fifth plate portion 19R5 of the frame 19R for the red panel is also formed so as to be located coaxially, and becomes one continuous through hole.

Here, as shown in FIG. 7, a through hole 19gb provided in the first sandwiching portion 23 and penetrating the green panel frame 19G and the blue panel frame 19B, and the green panel frame 19G and the red panel frame 19R A fixing pin 21 is inserted into each of the through holes 19 gr that penetrate the above. Similarly, a through hole provided in the second holding portion 24 and penetrating the green panel frame 19G and the blue panel frame 19B, and a through hole penetrating the green panel frame 19G and the red panel frame 19R, respectively. Insert the fixing pin 21 into the. As a result, the relative positional relationship between the green panel frame 19G, the blue panel frame 19B, and the red panel frame 19R is fixed, and the housing 12 is configured.

(6th step)
Next, the housing 12 is fixed to the display module main body 11 using an adhesive. At this time, of the six surfaces of the prism 15, an adhesive is applied to the fifth surface 15e and the sixth surface 15f where light does not enter and exit, and the frames 19B, 19R, and 19G constituting the housing 12 are attached to the prism 15. It is desirable to fix it. However, the position where the adhesive is applied is not particularly limited.

After the completion of this process, the display module main body 11 and the housing 12 are fixed, but since the optical adhesive interposed between the display panels 14B, 14R, 14G and the prism 15 is not completely cured, each display panel is fixed. The positions of the display panels 14B, 14R, 14G can be moved within the range of the dimensional allowance between the 14B, 14R, 14G and the frames 19B, 19R, 19G.

(7th step)
Next, the alignment between the blue display panel 14B, the red display panel 14R, and the green display panel 14G is performed. At this time, for example, an arbitrary alignment pattern is displayed on each display panel 14B, 14R, 14G, and while observing the overlapping condition of the three alignment patterns with a camera from the side of the fourth surface 15d of the prism 15, 3 The positions of the display panels 14B, 14R, and 14G may be finely adjusted so that the positions of the two alignment patterns match at the pixel level.

(8th step)
Next, the display panels 14B, 14R, 14G and the prism 15 are fixed by completely curing the optical adhesive.
Through the above steps, the display module 10 of this embodiment is completed.

Hereinafter, a configuration for attaching the display module 10 to the subframe 90 (support member) of the display device will be described.
FIG. 2 is a perspective view showing a state in which the display module 10 is attached to the subframe 90. FIG. 8 is a front view showing a state in which the display module 10 is attached to the subframe 90. FIG. 9 is an enlarged view of the position adjusting mechanism 26.

As shown in FIGS. 8 and 9, the display module 10 further includes a position adjusting mechanism 26 in addition to the display module main body 11 and the housing 12 described above. The position adjusting mechanism 26 is used to adjust the position of the display module 10 with respect to the subframe 90.

Here, the mounting surface 90a of the subframe 90 on which the display module 10 is mounted is represented as an XY plane, the two directions orthogonal to each other in the XY plane are the X direction and the Y direction, and the direction orthogonal to the XY plane is defined as the XY plane. The Z direction. At this time, the function of the position adjusting mechanism 26 will be specifically described. The position adjusting mechanism 26 is located in (1) the position of the display module 10 in the X and Y directions, and (2) in the XY plane of the display module 10. (3) The inclination of the display module 10 (the light emitting surface of the prism 15) with respect to the XY plane, and (4) the position of the display module 10 in the Z direction are adjusted.

The position adjusting mechanism 26 has a plurality of through holes 19b7, 19r7, a plurality of pins 27, and a plurality of sleeves 28.

As shown in FIG. 2, the display module 10 is attached to the subframe 90 (support member) of the display device via the first mounting portion 19B0 of the blue panel frame 19B and the second mounting portion 19R0 of the red panel frame 19R. It is attached. A light guide optical system (not shown) in the subsequent stage of the display module 10 is fixed to the subframe 90, and the optical axis of the light guide optical system is aligned with the subframe 90. The display module 10 is provided with a plurality of through holes 19b7 and 19r7 for attaching the display module 10 to the subframe 90. Specifically, the display module 10 is provided with two through holes 19b7 in the first mounting portion 19B0 and two through holes 19r7 in the second mounting portion 19R0.

The plurality of pins 27 are provided at positions where each of the plurality of pins 27 corresponds to each of the plurality of through holes 19b7 and 19r7. One end of each pin 27 is fixed to the subframe 90. Specifically, four pins 27 are fixed to the subframe 90, and one pin 27 provided in the first mounting portion 19B0 is composed of pins 27A having a surface on which fine screws are formed. The remaining three pins 27 are made up of pins 27B with a smooth surface that is not threaded. Hereinafter, the pin 27 on which the screw is formed is referred to as a diopter adjustment pin 27A, and the pin 27 on which the screw is not formed is referred to as a mounting pin 27B.

As shown in FIG. 10, one end of the diopter adjusting pin 27A is fixed to the subframe 90 via the pedestal 29. The diopter adjustment pin 27A is held on the pedestal 29 so that it cannot be moved but can be rotated. Further, a groove 27m into which a driver can be inserted is provided at the other end of the diopter adjusting pin 27A. As a result, when the driver is inserted into the groove 27m of the diopter adjustment pin 27A and rotated, the diopter adjustment pin 27A can be rotated without moving. On the other hand, one end of the mounting pin 27B shown in FIG. 8 is directly fixed to the subframe 90.

Each of the plurality of sleeves 28 is provided corresponding to each of the plurality of pins 27. Specifically, each sleeve 28 is slidably attached along the extending direction of each pin 27. Further, of the four sleeves 28, a screw that meshes with the screw of the diopter adjusting pin 27A is formed on the inner surface of the sleeve 28A into which the diopter adjusting pin 27A is inserted. On the other hand, the inner surface of the sleeve 28B into which the mounting pin 27B is inserted is a smooth surface.

As shown in FIG. 8, the inner diameter D1 of the through holes 19b7 and 19r7 is larger than the outer diameter D2 of the sleeve 28. That is, a gap is provided between the through holes 19b7 and 19r7 and the sleeve 28. After adjusting the position of the display module 10 according to the method described later, the gap between the through holes 19b7, 19r7 and the sleeve 28 is filled with the adhesive 31, and the sleeve 28 is fixed to the display module 10. As a result, the display module 10 is configured to be movable along the pin 27 via the sleeve 28.

A method of adjusting the position of the display module 10 having the above configuration will be described.
(First step)
First, the gap between the through holes 19b7, 19r7 and the sleeve 28 is left unfilled with the adhesive 31. In this state, the display module 10 is arranged above the subframe 90 so that the pins 27 and the sleeve 28 attached to the subframe 90 pass through the through holes 19b7 and 19r7. At this time, since there is a gap between the through holes 19b7, 19r7 and the sleeve 28, the position and inclination of the display module 10 with respect to the subframe 90 can be adjusted within the gap. As a result, of the above four items, (1) the position of the display module 10 in the X and Y directions, (2) the rotation of the display module 10 in the XY plane, and (3) the display module 10 with respect to the XY plane. You can adjust the three items of tilt.

(Second step)
Next, the adhesive 31 is filled in the gap between the through holes 19b7, 19r7 and the sleeve 28 and cured. As a result, the sleeve 28 is fixed to the display module 10. Here, the display module 10 can move along the pin 27 together with the sleeve 28. After the completion of the second step, the optical axis of the display module 10 and the optical axis of the light guide optical system fixed to the subframe 90 coincide with each other. The light emitted from the display module 10 is collimated and incident on the light guide optical system.

(Third step)
Next, the focal position of the display module 10 is adjusted to adjust the diopter. At this time, a screwdriver is inserted into the groove 27m of the diopter adjustment pin 27A, and the diopter adjustment pin 27A is rotated by the driver. At this time, since the diopter adjusting pin 27A and the sleeve 28A are threaded, the sleeve 28A moves along the diopter adjusting pin 27A by a distance corresponding to the amount of rotation of the diopter adjusting pin 27A. Further, the sleeve 28B around the mounting pin 27B also moves along the mounting pin 27B in conjunction with this movement. As a result, the display module 10 moves in the optical axis direction of the display module 10. In this way, the position of the item (4) display module 10 in the Z direction can be adjusted.

In the display module 10 of the present embodiment, the frames 19B, 19R, 19G holding the display panels 14B, 14R, 14G are composed of three plate portions, and the display panels 14B, 14R, 14G are attached to the prism 15. Before it is completely fixed, even after holding the display panels 14B, 14R, 14G in the frames 19B, 19R, 19G, the positions of the display panels 14B, 14R, 14G are finely adjusted and each is Precise alignment between the display panels 14B, 14R, and 14G can be performed. Further, since the display panels 14B, 14R, 14G are held by the frames 19B, 19R, 19G when the alignment is performed, the alignment work can be easily performed.

Further, the housing 12 is not a member that integrally covers the entire three display panels 14B, 14R, 14G, but three frames 19B, 19R, 19G that individually hold each of the three display panels 14B, 14R, 14G. Has a combined configuration. As a result, the display module 10 can be made smaller and lighter. As described above, according to the present embodiment, it is possible to provide the display module 10 which is easy to align between the plurality of display panels 14B, 14R, 14G and has a compact configuration.

Further, since the third plate portion 19B3 of the blue panel frame 19B is in contact with the blue display panel 14B, the blue panel frame 19B can stably hold the blue display panel 14B. Further, since the blue panel frame 19B is made of a metal material having high thermal conductivity and is thermally connected to the blue display panel 14B, the heat generated by the blue display panel 14B is conducted to the blue panel frame 19B. , The blue panel frame 19B can be efficiently discharged to the outside. As a result, the temperature rise of the blue display panel 14B is suppressed, so that the luminous efficiency and reliability of the blue display panel 14B can be improved. This effect is the same for the red display panel 14R and the green display panel 14G.

In the present embodiment, an example of a configuration in which the display panels 14B, 14R, 14G and the frames 19B, 19R, 19G are in direct contact with each other is given, but instead of this configuration, the display panels 14B, 14R, 14G are shown. And each frame 19B, 19R, 19G may be joined via a heat conductive adhesive. Even with this configuration, the same effect as described above can be obtained. That is, it is desirable that the display panels 14B, 14R, 14G and the frames 19B, 19R, 19G are thermally connected.

Further, in the blue panel frame 19B, since the first plate portion 19B1 and the second plate portion 19B2 facing each other are provided with the stepped portion 19b6 that abuts on the first surface 15a of the prism 15, the blue panel frame 19B Can stably hold the blue display panel 14B. Further, by appropriately setting the dimension L1 from the first surface 19Ba to the step portion 19b6 of the third plate portion 19B3, the gap between the blue display panel 14B and the prism 15 is appropriate even when the gap is zero. Can be managed. This effect is the same for the red display panel 14R and the green display panel 14G.

Further, of the three frames 19B, 19R, 19G, a first sandwiching portion in which a part of the green panel frame 19G and the prism 15 sandwich a part of the blue panel frame 19B and a part of the red panel frame 19R. 23 and the second sandwiching portion 24 are provided, the first sandwiching portion 23 and the second sandwiching portion 24 are provided with through holes 19 gb and 19 gr, and the through holes 19 gb and 19 gr are provided with fixing pins 21. The frames 19B, 19R, and 19G are securely fixed to each other, and the mechanical strength of the housing 12 can be ensured.

Further, since the display module 10 includes the position adjustment mechanism 26, the position of the display module 10 with respect to the subframe 90 along the optical axis direction can be appropriately changed by using the position adjustment mechanism 26. As a result, the user of the display device can adjust the diopter using a simple tool such as a screwdriver, and can improve the visibility of the displayed image.

[Second Embodiment]
Hereinafter, the second embodiment of the present invention will be described with reference to the drawings.
The display module described in the first embodiment is used in the display device described below.
FIG. 10 is an explanatory view of the head-mounted display device 1000 of the second embodiment. FIG. 11 is a perspective view schematically showing the configuration of the optical system of the virtual image display unit 1010 shown in FIG. FIG. 12 is an explanatory diagram showing an optical path of the optical system shown in FIG.

As shown in FIG. 10, the head-mounted display device 1000 (image display device) is configured as a see-through type eyeglass display, and has a frame 1110 provided with temples 1111, 1112 on the left and right. In the head-mounted display device 1000, the virtual image display unit 1010 is supported by the frame 1110, and causes the user to recognize the image ejected from the virtual image display unit 1010 as a virtual image. In the present embodiment, the head-mounted display device 1000 includes a left-eye display unit 1101 and a right-eye display unit 1102 as a virtual image display unit 1010. The left-eye display unit 1101 and the right-eye display unit 1102 have the same configuration and are arranged symmetrically.

In the following description, the left eye display unit 1101 will be mainly described, and the right eye display unit 1102 will be omitted.
As shown in FIGS. 11 and 12, in the head-mounted display device 1000, the left eye display unit 1101 guides the image display module 1 and the synthetic light Lb emitted from the image display module 1 to the emission unit 1058. It has a light guide optical system 1030. A projection lens system 1070 is arranged between the image display module 1 and the light guide optical system 1030, and the synthetic light Lb emitted from the image display module 1 passes through the light guide optical system 1070 via the projection lens system 1070. It is incident on 1030. The projection lens system 1070 is composed of one collimating lens having a positive power.

The image display module 1 includes a prism 15 and three display panels 14B, 14R, and 14G provided so as to face three of the four surfaces of the prism 15. The display panels 14B, 14R, and 14G are composed of, for example, an organic EL panel.

The image light emitted from the red display panel 14R is incident on the prism 15 as the first image light LR in the first wavelength region. The image light emitted from the blue display panel 14B is incident on the prism 15 as the second image light LB in the second wavelength region. The image light emitted from the green display panel 14G is incident on the prism 15 as the third image light LG in the third wavelength region. From the prism 15, synthetic light Lb in which the first image light LR, the second image light LB, and the third image light LG are combined is emitted.

In the present embodiment, the first wavelength region is, for example, 620 nm to 750 nm, and the red display panel 14R emits the red first image light LR. The second wavelength region is, for example, 450 nm to 495 nm, and the blue display panel 14B emits the blue second image light LB. The third wavelength region is, for example, 495 nm to 570 nm, and the green display panel 14G emits the green third image light LG. In the present embodiment, the first image light LR, the second image light LB, and the third image light LG are lights having no polarization characteristic.

The light guide optical system 1030 includes a translucent incident portion 1040 into which the combined light Lb is incident, and a translucent light guide unit 1050 whose one end 1051 side is connected to the incident portion 1040. In the present embodiment, the incident portion 1040 and the light guide portion 1050 are configured by an integral translucent member.

The incident portion 1040 includes an incident surface 1041 on which the composite light Lb emitted from the image display module 1 is incident, and a reflecting surface 1042 that reflects the composite light Lb incident from the incident surface 1041 between the incident surface 1041. ing. The incident surface 1041 is formed of a flat surface, an aspherical surface, a free curved surface, or the like, and faces the image display module 1 via the projection lens system 1070. The projection lens system 1070 is arranged obliquely so that the distance between the incident surface 1041 and the end portion 1412 is wider than the distance between the incident surface 1041 and the end portion 1411. Although no reflective film is formed on the incident surface 1041, the light incident at an incident angle equal to or higher than the critical angle is totally reflected. Therefore, the incident surface 1041 has light transmission and light reflection. The reflective surface 1042 is composed of a surface facing the incident surface 1041 and is arranged obliquely so that the end portion 1422 is separated from the incident surface 1041 with respect to the end portion 1421 of the incident surface 1041. Therefore, the incident portion 1040 has a substantially triangular shape. The reflective surface 1042 is made of a flat surface, an aspherical surface, a free curved surface, or the like. The reflective surface 1042 has a structure in which a reflective metal layer containing aluminum, silver, magnesium, chromium, or the like as a main component is formed.

The light guide unit 1050 has a first surface 1056 (first reflecting surface) extending from one end 1051 toward the other end 1052 and a first surface 1056 facing parallel to the first surface 1056 and facing the first surface 1056 from the one end 1051 side to the other end 1052. It includes a second surface 1057 (second reflecting surface) extending toward the side, and an injection portion 1058 provided at a portion of the second surface 1057 separated from the incident portion 1040. The first surface 1056 and the reflecting surface 1042 of the incident portion 1040 are connected to each other via a slope 1043. The thickness of the first surface 1056 and the second surface 1057 is thinner than that of the incident portion 1040. The first surface 1056 and the second surface 1057 totally reflect the light incident at an incident angle equal to or higher than the critical angle, based on the difference in refractive index between the light guide unit 1050 and the outside world (air). Therefore, no reflective film is formed on the first surface 1056 and the second surface 1057.

The injection unit 1058 is formed on a part of the light guide unit 1050 on the second surface 1057 side in the thickness direction. In the injection unit 1058, a plurality of partially reflecting surfaces 1055 inclined obliquely with respect to the normal direction with respect to the second surface 1057 are arranged in parallel with each other. The injection portion 1058 is a portion of the second surface 1057 that overlaps a plurality of partial reflection surfaces 1055, and is a region having a predetermined width in the extending direction of the light guide portion 1050. Each of the plurality of partially reflecting surfaces 1055 is composed of a dielectric multilayer film. Further, at least one of the plurality of partially reflecting surfaces 1055 may be a composite layer of a dielectric multilayer film and a reflective metal layer (thin film) containing aluminum, silver, magnesium, chromium or the like as main components. Good. When the partially reflecting surface 1055 contains a metal layer, the effect of increasing the reflectance of the partially reflecting surface 1055, or the incident angle dependence and polarization dependence of the transmittance and reflectance of the partially reflecting surface 1055 can be optimized. effective. The injection unit 1058 may be provided with an optical element such as a diffraction grating or a hologram.

In the head-mounted display device 1000 having the above configuration, the synthetic light Lb composed of parallel light incident from the incident portion 1040 is refracted by the incident surface 1041 and directed toward the reflecting surface 1042. Next, the combined light Lb is reflected by the reflecting surface 1042 and heads toward the incident surface 1041 again. At that time, since the combined light Lb is incident on the incident surface 1041 at an incident angle equal to or higher than the critical angle, it is reflected by the incident surface 1041 toward the light guide unit 1050 and heads toward the light guide unit 1050. The incident portion 1040 is configured such that the combined light Lb, which is parallel light, is incident on the incident surface 1041, but the incident surface 1041 and the reflecting surface 1042 are formed by a free curved surface or the like, and the composite light is non-parallel light. A configuration may be adopted in which Lb is incident on the incident surface 1041 and then converted into parallel light while being reflected between the reflecting surface 1042 and the incident surface 1041.

In the light guide unit 1050, the combined light Lb is reflected between the first surface 1056 and the second surface 1057 and travels. A part of the synthetic light Lb incident on the partially reflecting surface 1055 is reflected by the partially reflecting surface 1055 and emitted from the emitting portion 1058 toward the observer's eye E. Further, the rest of the synthetic light Lb incident on the partial reflection surface 1055 passes through the partial reflection surface 1055 and is incident on the next adjacent partial reflection surface 1055. Therefore, the synthetic light Lb reflected by each of the plurality of partially reflecting surfaces 1055 is emitted from the emitting unit 1058 toward the observer's eye E. This allows the observer to recognize the virtual image.

At that time, the light incident on the light guide unit 1050 from the outside world, after being incident on the light guide unit 1050, passes through the partially reflecting surface 1055 and reaches the observer's eye E. Therefore, the observer can see the color image emitted from the image display module 1 and see through the scenery of the outside world.

Since the head-mounted display device 1000 of the second embodiment includes the display module of the first embodiment, the display quality is excellent.

The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above embodiment, in the first sandwiching portion and the second sandwiching portion, the green panel frame and the blue panel frame, and the green panel frame and the red panel frame are interconnected as the above embodiment. , A combination of a through hole and a fixing pin is used. Instead of this configuration, the green panel frame and the blue panel frame can be formed by fitting each other, for example, a concave portion provided in the green panel frame and a convex portion provided in the blue panel frame. Each frame may be provided with a fitting portion that connects the green panel frame and the red panel frame to each other.

Further, as the display module of the above embodiment, an example of a configuration including three display elements including a blue display panel, a red display panel, and a green panel and a prism has been given. For example, an organic EL element that emits blue light There are two display modules, such as a first display element in which an organic EL element that emits red light is provided on one panel and a second display element in which an organic EL element that emits green light is provided. It may have a configuration including a display element and a prism.

Further, in the above embodiment, an example of a configuration in which the display panel has two substrates, an element substrate and a sealing substrate, and the sealing substrate is bonded to the prism is given, but instead of this configuration, The display panel may not have a sealing substrate, and the surface of the element substrate on the side where the organic EL element is formed may be directly bonded to the prism.

Further, in the above embodiment, an example of a configuration in which a prism and an organic EL panel are combined is given as a display module, but the display element is not limited to the organic EL panel, and self-luminous light such as an inorganic EL panel and a micro LED panel is given. A mold panel may be used. Further, instead of the self-luminous panel that emits image light having no polarization characteristic, a display element that emits image light having polarization characteristic such as a liquid crystal panel may be used.

In addition, specific configurations such as constituent materials, numbers, arrangements, shapes, etc. of the display modules and the constituent elements of the display device illustrated in the above embodiment can be appropriately changed.

Further, as an example of the display device provided with the display module described in the above embodiment, a head-up display or the like can be mentioned in addition to the head-mounted display.

1 ... Image display module, 10 ... Display module, 11 ... Display module body, 12 ... Housing, 14B ... Blue display panel (first display element), 14R ... Red display panel (second display element), 14G ... Green display panel (3rd display element), 15 ... Prism, 19B ... Blue panel frame (1st frame), 19R ... Red panel frame (2nd frame), 19G ... Green panel frame (3rd frame), 19B0 ... 1 Mounting part (mounting part), 19R0 ... 2nd mounting part (mounting part), 19B1 ... 1st plate part, 19B2 ... 2nd plate part, 19B3 ... 3rd plate part, 19R4 ... 4th plate part, 19R5 ... 5 plate part, 19R6 ... 6th plate part, 19G7 ... 7th plate part, 19G8 ... 8th plate part, 19G9 ... 9th plate part, 19b6, 19r6 ... stage part, 19g7 ... 1st stage part, 19g8 ... 2nd Steps, 19gb, 19gr ... Through holes, 21 ... Fixing pins (connecting members), 23 ... 1st holding part, 24 ... 2nd holding part, 26 ... Position adjustment mechanism, 1000 ... Head-mounted display device (display) apparatus).

Claims (12)

Display module body and
The housing provided in the display module body and
With
The display module main body is a prism that synthesizes a first display element, a second display element, a first light emitted from the first display element, and a second light emitted from the second display element. And have
The housing holds a first frame that holds the first display element in a state of facing the first surface of the prism, and a second frame that holds the second display element in a state of facing the second surface of the prism. Has 2 frames,
The first frame has a first plate portion and a second plate portion that face each other, and a third plate portion that connects the first plate portion and the second plate portion.
The second frame has a fourth plate portion and a fifth plate portion that face each other, and a sixth plate portion that connects the fourth plate portion and the fifth plate portion.
At least one of the first frame and the second frame has a mounting portion for mounting the display module main body to the support member.
In the first frame, the prism is located between the first plate portion and the second plate portion, and the third plate portion is in contact with the first display element and is opposed to the first surface. Then, holding the first display element,
In the second frame, the prism is located between the fourth plate portion and the fifth plate portion, and the sixth plate portion is in contact with the second display element and is opposed to the second surface. A display module that holds the second display element. The first frame and the second frame are composed of a metal material.
The display module according to claim 1, wherein the first frame and the first display element are thermally connected, and the second frame and the second display element are thermally connected. A step that defines the distance between the first display element and the first surface by abutting a part of the first surface of the prism on the first plate portion and the second plate portion of the first frame. The part is provided,
A step that defines the distance between the second display element and the second surface by abutting a part of the second surface of the prism on the fourth plate portion and the fifth plate portion of the second frame. The display module according to claim 1 or 2, wherein a unit is provided. The display module main body further includes a third display element.
The prism synthesizes the first light, the second light, and the third light emitted from the third display element.
The housing further comprises a third frame that holds the third display element in a state of facing the third surface of the prism.
The third frame has a seventh plate portion and an eighth plate portion facing each other, and a ninth plate portion connecting the seventh plate portion and the eighth plate portion.
In the third frame, the prism is located between the seventh plate portion and the eighth plate portion, and the third plate portion is in contact with the third display element and is opposed to the third surface. The display module according to any one of claims 1 to 3, which holds the third display element. The third frame is composed of a metal material.
The display module according to claim 4, wherein the third frame and the third display element are thermally connected. A step that defines the distance between the third display element and the third surface by abutting a part of the third surface of the prism on the seventh plate portion and the eighth plate portion of the third frame. The display module according to claim 4 or 5, wherein a unit is provided. The first surface and the second surface of the prism face each other, and the third surface is located in a direction intersecting the first surface and the second surface.
A first sandwiching portion in which a part of the seventh plate portion and the prism sandwich a part of the first plate portion and a part of the fourth plate portion, or a part of the eighth plate portion and the prism. The display module according to any one of claims 4 to 6, wherein a second sandwiching portion for sandwiching a part of the second plate portion and a part of the fifth plate portion is provided. A through hole is provided in the first holding portion or the second holding portion.
The display module according to claim 7, wherein a connecting member for connecting the first frame and the third frame, and the second frame and the third frame is provided in the through hole. A fitting portion for connecting the first frame and the third frame, and the second frame and the third frame is provided by fitting the first holding portion or the second holding portion to each other. The display module according to claim 7. The display module according to any one of claims 1 to 9, wherein the mounting portion is provided in each of the first frame and the second frame. The display module according to any one of claims 1 to 10, wherein a position adjusting mechanism for adjusting the position of the display module main body with respect to the support member is provided in the mounting portion. A display device including the display module according to any one of claims 1 to 11.

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